Valve.



1. P. CLARK. f

vALvE. APPLICATION FILED FEB. I6. |915.

Patented Apr. 11, 1916.

Ey y l y E- i .M a?. n M

THE COLUMBIA PLANOGRAPH C0., WASHINGTON, D. C.

JoHN r. CLARK, oF LEETONIA, OHIO.

vALvE. l

Specication of Letters Patent.

Patented Apr. 11, v191e.

Application filed February 1e, 1915. serial No. 8,652.

To all whom t may concern Be it known that I, JOHN P. CLARK, a citi# zen of the United States, residing at Leetonia, in the county of Columbiana and State of Ohio, have invented new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves and more particularly to safety gas valves.

The principal object of the invention is to provide an improved type of pressure regulated gas valves which act upon a predetermined decrease in the pressure to automatically cut off the supply to the jets. It frequently occurs that during the night when pressure is cut down that low lights will flicker out with the 4result that the room is subsequently flooded with gas. Y

It is the object of the invention to avoid these difficulties and broadly speaking the invention consists in providing a valve which is held in open position by a predetermined pressure of gas and when released by reduction of the pressure will gravitate to closed position and be locked by suitable mechanism. Means is also provided forpreventing the actuation of the locking means when desired.

Further objects of the invention will appear as the following description is read in connection with the accompanying drawing, which forms a part of this application, and in which Figure 1 is a longitudinal sectional view. Fig. 2 is a vertical section of Fig. 1 showing the valve and the valve seat and the manner in which the former is arranged within the casing. Fig. 3 is a top plan view showing one of the plungers in position to prevent the operation of the locking means. Fig. 4 is a detail perspective view showing a modified form.

Referring to the drawings, and more particularly to Figs. 1 and 2, 1 represents a pipe having an apertured diaphragm 2 extending.

across the same and provided with a valve seat 3 upon which the valve 4 is adapted to rest, as will be hereinafter described. This valve is provided with an annular groove 5 which produces shoulders 6, and slides through the pipe l transversely across a casing 7 secured to the top of the pipe in airtight relation. This casing is provided with suitable packing nuts or glands 8 in which are slidably mounted the locking plungers 9 automatically actuated to engage the groove 6 by means of the springs 10 which vsurround the plungers 11 between the ends of the casing and suitable collars 12 carried by the plungers. n

The springs 10 are very light and do not hold the plungers against the' valve with sufficient force to hold the valve against normal downward movement when the pressure in the pipe is reduced to a predetermined degree, but are sufficiently strong to move the plungers toward each other for engagement with the annular groove 6 and shoulder 7 whenL the valve drops to itsseat 3. The top of the casing is `provided with an aperture 13 through which the valve may be passed to throw it to operative position and this aperture. is covered by the cap plate 14 removably connected to the casing by screws or other fastening devices 15.

In order to hold the plungers against operation to automatically lock the valve in depressed position when this member is lowered the plungers are provided with laterally extending pins 16 which travel in grooves 17 formed in the packing nuts 8. When the plungers are withdrawn sufficiently to release the pins from the groove andgiven a slightturn the pins will engage the outer end of the packing nuts and limit the inward movement of the plungers.

In the modification shown in Fig. 4 the valve 4 is provided with an annular groove 18 having the lower wall thereof serrated or roughened, as shown at 19, so as to be engaged by the pawls 20 pivoted upon the ends of the plungers 10. In this form when the valve drops a predetermined degree the pawls move downwardly with the valve and catch upon the serrated shoulder 19, thus holding the valve in depressed position. In this instance, the plungers are normally held in the positions shown but may be retracted against the tension of their springs 10 so as to permit the elevation of the plunger on the pressure of the gas passing through the port or aperture in the diaphragm.

It will be seen from the foregoing that as the valve is held in open position by the that the pipe l is adapted to be connected at one end to a suitable source of gas supply and at the opposite end to the house pipes,

W'hat is claimed is 1. In combination, a gas service pipe having an apertured valve seat member extend` ing across the same, a casing mounted upon the pipe, a valve extending transversely through said casing and slidably mounted therein, an annular groove for said valve and disposed Within said casing, plungers slidably mounted Within the said casing and having the confronting ends thereof engaging said valve Within saidgroove, and springs encircling each of said plungers and adapted to actuate said plungers to engage the groove of said valve.

2. The combina-tion, in a service pipe having an apertured valve seat, extending across the same, a casing mounted upon the pipe, a

valve extending transversely through said casing and Working in said valve seat, said valve provided With a groove which is disposed Within said casing, plungers slidaloly mounted Within said casing and disposed at the opposite sides of said valve, serrations formed on the lower Wall of the said groove, pawls pivotally mounted on the confronting ends of each of said plungers and adapted to be engaged by said serrations when the valve is in closed position, and springs encircling each of said plungers and adapted to actuate said rods to cause the pawls to engage the serrations.

In testimony whereof I affix my signature in presence of two witnesses.

JOI-IN P. CLARK. lvitnesses P. J. MCNULTY, IRWIN D. SMYTi-I.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

